Actress Diane Keaton remains an icon, decades after her Oscar-winning performance in Annie Hall. At 68, she's a single mother of two, once romantically linked to some of Hollywood's biggest heartthrobs and still starring in films. And she still rocks her trademark look: a bowler hat, tinted glasses, oversized clothes, scarves, gloves, long sleeves and boots — "Clothing that actually hides the body," she says. "There's a lot to hide in my case. I'm the only remaining person on earth with this particular look."

For our interview, I wore a turtleneck sweater. She's known for wearing turtlenecks even in summer; it's something Jack Nicholson's character chided her about in the film Something's Gotta Give.

In her new memoir, Let's Just Say It Wasn't Pretty, Keaton has a chapter about turtlenecks — which, she notes, frame your head — and bikinis and bras. She writes a lot about fashion — particularly menswear inspired by Cary Grant and Katharine Hepburn — and beauty, which she now finds in things like the ocean and her children's faces, old buildings and kisses from her dogs. And she reveals her many insecurities: She frets about aging, her hair thinning and her eyes drooping.

"They keep falling down. It's like the weirdest shaped eyes," she laughs. "I have also a hair fixation. I frequently have to tell myself, you're not allowed to wear your hat today."

Keaton recalls trying to reshape her nose with a clothespin, but unlike many of her Hollywood contemporaries, she hasn't had any work done on her face. "No. I haven't done that," she says. "But I could and I might, but at this point, it might be a little too late."

In her book, Keaton comes to the conclusion that flaws are beautiful, after all. "I feel like wrong can be right in a lot of ways," she says. "So all those things you're disappointed with in yourself can work for you." And the shape of her eyes, she writes, is something she has in common with her father.

Keaton was born near Pasadena, Calif., the oldest daughter of Jack Hall, a real estate broker and civil engineer. In her best-selling book Then Again, she also paid homage to her mother, Dorothy — a homemaker once crowned "Mrs. Los Angeles."

"I think about them all the time," says Keaton. "They really defined me. And I was perfect as a daughter. I was a good daughter. That's the role I really like. I need to have somebody kind of guiding me, which my mother did."

Keaton says her mom cheered on her dreams of becoming a singer and performer. In the late 1960s, she set off from Southern California for New York City to study acting at the Neighborhood Playhouse. She ended up an understudy in the original Broadway production of the rock musical Hair. "It was wild; it was unexpected," Keaton says. "But I could see I really wasn't a hippie." Keaton famously refused to go onstage nude for the final scene of Hair.

Then along came Woody Allen. He cast her in Play It Again, Sam, the play and then the movie, as well as his films Sleeper, Love and Death, Manhattan, and, of course, Annie Hall.

Keaton's quirky role, written just for her, won her a Best Actress Oscar in 1978. She credits Woody Allen with her entire career, and recently accepted his lifetime achievement award at the Golden Globes. Throughout the controversy over Allen's alleged sexual abuse of his daughter Dylan Farrow, Keaton has stood by him.

In her new memoir, Keaton also reminisces about other old flames and co-stars: Warren Beatty, with whom she starred in the epic film Reds; and Al Pacino, with whom she starred in the Godfather series, and who she says is the love of her life.

"My concept of love with men was really very immature," Keaton says. "I never saw myself in the role of partner. I saw myself as the person they would love. ... It did not work, at all."

So Keaton never married, though in films she's one of very few older American actresses who still gets leading roles with the likes of Jack Nicholson, Robert De Niro and, this summer, Michael Douglas.

"She's playing the love interest a lot, you know, kind of passionately kissing and sweeping into the bedroom at an age when most people just sort of want to say, well that part is over," says her longtime friend, actress Carol Kane. "I mean, she just gets more and more beautiful because she's more and more herself."

In her book, Keaton writes about collecting photos of beautiful men, renovating beautiful houses, and raising children who've made her see beauty in new ways. When she turned 50, she adopted her daughter Dexter. Five years later, her son Duke.

"It's an unconventional life, it's true," she admits, adding that having her children was "just impossible for me to even comprehend how fascinating and wonderful but painful, too, it would be as a parent and take that responsibility on and be somebody who has to adjust her life, which I never had to do. That was for the first time in my life."

Keaton says she's always been a late bloomer, but the death of her parents finally got her to grow up.

"When you lose your parents, you're suddenly thrust into an entirely different world," she says. "You feel like you're basically living in a kind of wonderland. It's no longer grounded. And everything is new. It's all new. Your perceptions of the things around you — never having been a person who really noticed trees. Seriously, it's as simple as that. And I think this happens to a lot of people. And I think, in a way, it's a gift of being older."

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ROBERT SIEGEL, HOST:

Diane Keaton remains a star, decades after her Academy Award-winning performance in Woody Allen's film "Annie Hall." She is 68 and a single mother of two. Keaton's new memoir is called "Let's Just Say It Wasn't Pretty." NPR's Mandalit Del Barco spoke with her at NPR West about aging and love in Hollywood and becoming a parent late in life.

KEATON: Yeah. They frame your head. But if you have a short neck like me, it, you know, it'll do. Nothing's perfect.

BARCO: In her new book, Keaton writes a lot about her many insecurities. She frets about aging, her hair thinning, her eyes drooping.

KEATON: They keep falling down and look, it's like the weirdest shaped eyes. And, you know, I have also a hair fixation.

BARCO: Keaton writes that she's finally come to accept that all flaws are beautiful after all.

KEATON: I feel that wrong can be right. It can be right in a lot of ways so all those things that you're disappointed with in yourself can work for you.

BARCO: She remembers trying to reshape her nose with a clothing pin, but now she appreciates that the shape of her eyes is what she had in common with her father, Jack Hall, a real estate broker and civil engineer. Keaton says she still longs for him and her mother, Dorothy, a homemaker once crowned Mrs. Los Angeles who she wrote about in her first memoir a few years ago.

KEATON: I think about them all the time. I was a good daughter. That's the role that I really liked. I need to have somebody kind of guiding me, which my mother did because she was a great partner.

BARCO: Keaton says her mom cheered her on as she pursued her dreams of becoming a singer and performer in New York. After studying at the Neighborhood Playhouse in the 1960s, Keaton ended up an understudy in the original Broadway production of the rock musical "Hair."

(SOUNDBITE OF SONG, 'AGE OF AQUARIUS')

KEATON: It was wild. It was unexpected, but I could see that I really wasn't a hippie. I knew that I wasn't a hippie in "Hair."

BARCO: Keaton famously refused to go onstage nude for the final scene of "Hair." Then, along came Woody Allen. He cast her in "Play It Again, Sam," his play, then his movie, also his film comedy "Sleeper," "Love and Death Manhattan," and, of course, "Annie Hall."

(SOUNDBITE FROM FILM "ANNIE HALL")

BARCO: Keaton's quirky role won her a best actress Oscar in 1978. She credits Woody Allen with her entire career and recently accepted his lifetime achievement award at the Golden Globes. Throughout the controversy over allegations that Allen once molested his adopted daughter, Keaton has stood by him.

KEATON: That's never going to change. He's my very, very food friend.

(SOUNDBITE FROM FILM, "ANNIE HALL")

BARCO: In her new memoir, Keaton also reminisces about other old boyfriends and co-stars like Warren Beatty, Al Pacino and Jack Nicholson.

(SOUNDBITE OF GLASS BREAKING)

KEATON: My concept of love with men was really very immature. I never saw myself in the role of a partner. I saw myself as the person that they would love. It's just - it was not - it didn't not work at all.

BARCO: So Keaton married, though, in films, she's one of the very few older American actresses who still gets leading roles says her long-time friend, actress Carol Kane.

CAROL KANE: She's playing, you know, the love interest a lot, you know, kind of passionately kissing and swooping into the bedroom, you know, and at age when most people just sort of, you know, want to say, OK, well, that part is over, you know. I mean, she just gets more and more beautiful because she's more and more herself.

BARCO: In her book, Keaton writes about collecting photos of beautiful men, renovating beautiful houses and raising children who've made her see beauty in new ways. When she turned 50, she adopted her daughter, Dexter and five years later, her son Duke.

KEATON: It is. It's an unconventional life. It's true.

BARCO: At 68, Keaton says she's a late bloomer, but the death of her parents finally got her to grow up.

KEATON: When you lose your parents, you're suddenly thrust into an entirely different world. You feel like you're basically living in a kind of a wonderland. It's no longer grounded and everything is new. Your perceptions of the things around you, never having been a person who really noticed trees, seriously it's as simple as that.

And I think this happens to a lot of people and I think, in a way, it's a gift of being older.